This bosch expert cyl-9 multi construction drill bit is supplied as a pack of 10 bits, each with a 5mm diameter and 85mm overall length. A versatile mid-small size, the 5mm diameter is commonly used for a broad range of fixing and fastening tasks across materials such as granite, concrete, brick, soft tile, wood and metal and the pack of 10 keeps you stocked for busy on-site demands. Each bit is built to deliver up to 5x more precision than the bosch cyl-3, with fine-ground optimised carbide construction and bosch centering geometry ensuring a slip-free, accurate start. The optimised dust extraction channel works in tandem with the tip to clear chips quickly and maintain drilling speed. Features and benefits: up to 5x more precise than bosch cyl-3 for professional-grade accuracy bosch centering geometry for a slip-free start and stabilised action precision centring tip for accurate, repeatable hole placement fine-ground high-performance carbide tip for razor-sharp, durable edges optimised dust extraction channel for efficient chip removal and faster drilling cylindrical shank compatible with three-jaw drill chucks specifications: diameter: 5mm length: 85mm pack quantity: 10 contents: pack of 10